1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2014 6WIND S.A.
5 /* This file manages the list of devices and their arguments, as given
6 * by the user at startup
14 #include <rte_class.h>
15 #include <rte_compat.h>
17 #include <rte_devargs.h>
18 #include <rte_errno.h>
19 #include <rte_kvargs.h>
21 #include <rte_tailq.h>
22 #include <rte_string_fns.h>
23 #include "eal_private.h"
25 /** user device double-linked queue type definition */
26 TAILQ_HEAD(rte_devargs_list, rte_devargs);
28 /** Global list of user devices */
29 static struct rte_devargs_list devargs_list =
30 TAILQ_HEAD_INITIALIZER(devargs_list);
33 devargs_layer_count(const char *s)
37 while (s != NULL && s[0] != '\0') {
44 /* Resolve devargs name from bus arguments. */
46 devargs_bus_parse_default(struct rte_devargs *devargs,
47 struct rte_kvargs *bus_args)
51 /* Parse devargs name from bus key-value list. */
52 name = rte_kvargs_get(bus_args, "name");
54 RTE_LOG(INFO, EAL, "devargs name not found: %s\n",
58 if (rte_strscpy(devargs->name, name, sizeof(devargs->name)) < 0) {
59 RTE_LOG(ERR, EAL, "devargs name too long: %s\n",
67 rte_devargs_layers_parse(struct rte_devargs *devargs,
73 struct rte_kvargs *kvlist;
75 { RTE_DEVARGS_KEY_BUS "=", NULL, NULL, },
76 { RTE_DEVARGS_KEY_CLASS "=", NULL, NULL, },
77 { RTE_DEVARGS_KEY_DRIVER "=", NULL, NULL, },
79 struct rte_kvargs_pair *kv = NULL;
80 struct rte_class *cls = NULL;
81 struct rte_bus *bus = NULL;
82 const char *s = devstr;
86 bool allocated_data = false;
88 /* Split each sub-lists. */
89 nblayer = devargs_layer_count(devstr);
90 if (nblayer > RTE_DIM(layers)) {
91 RTE_LOG(ERR, EAL, "Invalid format: too many layers (%zu)\n",
97 /* If the devargs points the devstr
98 * as source data, then it should not allocate
99 * anything and keep referring only to it.
101 if (devargs->data != devstr) {
102 devargs->data = strdup(devstr);
103 if (devargs->data == NULL) {
104 RTE_LOG(ERR, EAL, "OOM\n");
108 allocated_data = true;
113 if (i >= RTE_DIM(layers)) {
114 RTE_LOG(ERR, EAL, "Unrecognized layer %s\n", s);
119 * The last layer is free-form.
120 * The "driver" key is not required (but accepted).
122 if (strncmp(layers[i].key, s, strlen(layers[i].key)) &&
123 i != RTE_DIM(layers) - 1)
126 layers[i].kvlist = rte_kvargs_parse_delim(s, NULL, "/");
127 if (layers[i].kvlist == NULL) {
128 RTE_LOG(ERR, EAL, "Could not parse %s\n", s);
139 /* Parse each sub-list. */
140 for (i = 0; i < RTE_DIM(layers); i++) {
141 if (layers[i].kvlist == NULL)
143 kv = &layers[i].kvlist->pairs[0];
146 if (strcmp(kv->key, RTE_DEVARGS_KEY_BUS) == 0) {
147 bus = rte_bus_find_by_name(kv->value);
149 RTE_LOG(ERR, EAL, "Could not find bus \"%s\"\n",
154 } else if (strcmp(kv->key, RTE_DEVARGS_KEY_CLASS) == 0) {
155 cls = rte_class_find_by_name(kv->value);
157 RTE_LOG(ERR, EAL, "Could not find class \"%s\"\n",
162 } else if (strcmp(kv->key, RTE_DEVARGS_KEY_DRIVER) == 0) {
168 /* Fill devargs fields. */
169 devargs->bus_str = layers[0].str;
170 devargs->cls_str = layers[1].str;
171 devargs->drv_str = layers[2].str;
175 /* If we own the data, clean up a bit
176 * the several layers string, to ease
177 * their parsing afterward.
179 if (devargs->data != devstr) {
180 char *s = devargs->data;
182 while ((s = strchr(s, '/'))) {
188 /* Resolve devargs name. */
189 if (bus != NULL && bus->devargs_parse != NULL)
190 ret = bus->devargs_parse(devargs);
191 else if (layers[0].kvlist != NULL)
192 ret = devargs_bus_parse_default(devargs, layers[0].kvlist);
195 for (i = 0; i < RTE_DIM(layers); i++) {
196 if (layers[i].kvlist)
197 rte_kvargs_free(layers[i].kvlist);
200 if (allocated_data) {
201 /* Free duplicated data. */
203 devargs->data = NULL;
211 bus_name_cmp(const struct rte_bus *bus, const void *name)
213 return strncmp(bus->name, name, strlen(bus->name));
217 rte_devargs_parse(struct rte_devargs *da, const char *dev)
219 struct rte_bus *bus = NULL;
221 const size_t maxlen = sizeof(da->name);
227 /* Retrieve eventual bus info */
230 bus = rte_bus_find(bus, bus_name_cmp, dev);
233 devname = dev + strlen(bus->name) + 1;
234 if (rte_bus_find_by_device_name(devname) == bus)
237 /* Store device name */
239 while (devname[i] != '\0' && devname[i] != ',') {
240 da->name[i] = devname[i];
243 RTE_LOG(WARNING, EAL, "Parsing \"%s\": device name should be shorter than %zu\n",
245 da->name[i - 1] = '\0';
251 bus = rte_bus_find_by_device_name(da->name);
253 RTE_LOG(ERR, EAL, "failed to parse device \"%s\"\n",
259 /* Parse eventual device arguments */
260 if (devname[i] == ',')
261 da->data = strdup(&devname[i + 1]);
263 da->data = strdup("");
264 if (da->data == NULL) {
265 RTE_LOG(ERR, EAL, "not enough memory to parse arguments\n");
268 da->drv_str = da->data;
273 rte_devargs_parsef(struct rte_devargs *da, const char *format, ...)
283 va_start(ap, format);
284 len = vsnprintf(NULL, 0, format, ap);
290 dev = calloc(1, (size_t)len);
292 RTE_LOG(ERR, EAL, "not enough memory to parse device\n");
296 va_start(ap, format);
297 vsnprintf(dev, (size_t)len, format, ap);
300 ret = rte_devargs_parse(da, dev);
307 rte_devargs_reset(struct rte_devargs *da)
317 rte_devargs_insert(struct rte_devargs **da)
319 struct rte_devargs *listed_da;
322 if (*da == NULL || (*da)->bus == NULL)
325 TAILQ_FOREACH_SAFE(listed_da, &devargs_list, next, tmp) {
326 if (listed_da == *da)
327 /* devargs already in the list */
329 if (strcmp(listed_da->bus->name, (*da)->bus->name) == 0 &&
330 strcmp(listed_da->name, (*da)->name) == 0) {
331 /* device already in devargs list, must be updated */
332 (*da)->next = listed_da->next;
333 rte_devargs_reset(listed_da);
335 /* replace provided devargs with found one */
341 /* new device in the list */
342 TAILQ_INSERT_TAIL(&devargs_list, *da, next);
346 /* store in allowed list parameter for later parsing */
348 rte_devargs_add(enum rte_devtype devtype, const char *devargs_str)
350 struct rte_devargs *devargs = NULL;
351 struct rte_bus *bus = NULL;
352 const char *dev = devargs_str;
354 /* use calloc instead of rte_zmalloc as it's called early at init */
355 devargs = calloc(1, sizeof(*devargs));
359 if (rte_devargs_parse(devargs, dev))
361 devargs->type = devtype;
363 if (devargs->type == RTE_DEVTYPE_BLOCKED)
364 devargs->policy = RTE_DEV_BLOCKED;
365 if (bus->conf.scan_mode == RTE_BUS_SCAN_UNDEFINED) {
366 if (devargs->policy == RTE_DEV_ALLOWED)
367 bus->conf.scan_mode = RTE_BUS_SCAN_ALLOWLIST;
368 else if (devargs->policy == RTE_DEV_BLOCKED)
369 bus->conf.scan_mode = RTE_BUS_SCAN_BLOCKLIST;
371 TAILQ_INSERT_TAIL(&devargs_list, devargs, next);
376 rte_devargs_reset(devargs);
384 rte_devargs_remove(struct rte_devargs *devargs)
386 struct rte_devargs *d;
389 if (devargs == NULL || devargs->bus == NULL)
392 TAILQ_FOREACH_SAFE(d, &devargs_list, next, tmp) {
393 if (strcmp(d->bus->name, devargs->bus->name) == 0 &&
394 strcmp(d->name, devargs->name) == 0) {
395 TAILQ_REMOVE(&devargs_list, d, next);
396 rte_devargs_reset(d);
404 /* count the number of devices of a specified type */
406 rte_devargs_type_count(enum rte_devtype devtype)
408 struct rte_devargs *devargs;
409 unsigned int count = 0;
411 TAILQ_FOREACH(devargs, &devargs_list, next) {
412 if (devargs->type != devtype)
419 /* dump the user devices on the console */
421 rte_devargs_dump(FILE *f)
423 struct rte_devargs *devargs;
425 fprintf(f, "User device list:\n");
426 TAILQ_FOREACH(devargs, &devargs_list, next) {
427 fprintf(f, " [%s]: %s %s\n",
428 (devargs->bus ? devargs->bus->name : "??"),
429 devargs->name, devargs->args);
433 /* bus-aware rte_devargs iterator. */
435 rte_devargs_next(const char *busname, const struct rte_devargs *start)
437 struct rte_devargs *da;
440 da = TAILQ_NEXT(start, next);
442 da = TAILQ_FIRST(&devargs_list);
444 if (busname == NULL ||
445 (strcmp(busname, da->bus->name) == 0))
447 da = TAILQ_NEXT(da, next);